Xperia Z

I have an Xperia Z5 which will be going back to SONY for the 3rd time. Don't get me wrong this is a great phone and I am a SONY fan who has had Z series phones for the past 6 years but, the service from SONY is just ridiculous. My phone went in for 6 weeks for the first time for a lost signal problem and came back to me with the same problem. It went back and they sent me a new phone which was described as new but was actually refurbished. I could tell by the sc**** marks on the side. The keyboard did not want to work and the stereo speakers were not stereo per se, the one was playing way softer than the other one. I sent this back immediately as I was not impressed. It took almost for weeks for the phone to come back to me with the message "there is nothing wrong with the device". My original phone was immaculate with no scratches or cracks on the screen. I now have a problem where the screen does not come on allowing me to drop a call. This will be the 4th time this year I am sending this phone back. I want a new Z5 or the next best to this model at least. I will not continue to support SONY if I am treated like this, I really love the phone and brand itself but come on, where do your customers fit in all this SONY? I expect a quick, swift reply to this complaint or it will go further.